Summary
This module seeks to give a basic introduction to Coatings Nanomechanics and Tribology. The use of coatings to modify the mechanical and tribological properties, as well as the available testing techniques and basic design rules – that should be useful both to industrial design engineers and to academic researchers – will be reviewed.
Topics
Introduction to Surface Engineering
- Surface engineering processes: surface treatment vs. surface coating.
- The Surface Engineering Coatings market.
Coatings Nanomechanics
- The indentation hardness at macro, micro, and nanoscale.
- The basics of the nanoindentation technique.
- Typical mistakes during the measurement of coatings.
- Advantages of modern nanoindenters: high speed nanoindentation, statistical nanoindentation technique, stress/strain curves, nanofriction and nanowear, nano-tribocorrosion, etc.
Coatings Tribology
- Categorizations of coating wear regimes (surface property requirements; regime interactions). Difference between sliding and rolling contacts. Environmental influence: temperature, humidity, greases and lubricants, gases, vacuum.
- Coatings tribological testing: friction, wear, adhesion, and beyond.
- Tribological strategies to characterize and evaluate: a) single components vs. whole device; b) laboratory study vs. field study; c) accelerated tests.
- Coating design considerations: single layer vs multilayers; H/E and H3/E2 coating design for wear modification; adhesion layers; stress management.
Instructor
Esteban Broitman
Scientific Director
Sentys Inc. – San Francisco (USA)
